The IBESS model – Elements, realisation and validation

Experimental investigation and numerical simulation of fatigue crack formation in polycrystalline materials

“…The numerical strategy established in the present contribution enables the determination of initial crack size probability distributions under various loading conditions to be used as the starting point for a further fracture mechanics assessment of material failure using analytical strategies such as the IBESS model presented by Madia et al [3].…”

Fatigue of welded joints described by elastic‐plastic fracture mechanics

“…5 shows results obtained for a butt weld with semi-circular surface crack and weld flank angle α = 30°. A comparison with the results of an analytical formula presented in reference [12] is shown. In fact, the finite element results of the present investigation served as benchmark for the development of the formula.…”

“…-In conjunction with this, the variation of the weld toe geometry is considered in a stochastic model. The IBESS-procedure is described in reference [12]. The paper at hand summarizes the contributions of the authors to the development of the final procedure.…”

Data Assimilation in the Welding Process for Analysis of Weld Toe Geometry and Heat Source Model

“…Under these circumstances, various numerical methods have been proposed to predict the fatigue properties in the welded joints. For example, a fracture mechanics-based approach has been recently developed in IBESS project, 7,8) and the experimental validation showed that the IBESS model provided the accurate prediction of the fatigue crack propagation and fatigue life. The problem in such fracture mechanics-based methods is that they require an assumption of initial crack size to calculate stress intensity factor, and do not explicitly consider the effects of microstructure.…”